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#Question id: 3264


Which of the following is (are) true of natural selection?

#Section 2: Evolution
  1. requires genetic variation

  2. Results in descent with modification

  3. Involves differential reproductive success

  4. All of the above


Answer:- Option(s): 4


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#Question id: 11242

#Section 2: Evolution

A disadvantage of sexual reproduction is

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#Question id: 4579

#Section 2: Evolution

About which of these did Darwin have a poor understanding?

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#Question id: 12265

#Section 1: Ecology

A metapopulation consists of

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#Question id: 8294

#Section 2: Evolution

The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The fourchambered hearts of birds and mammals are best described as ________.

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#Question id: 10587

#Section 2: Evolution

The above pyramid 


Which of the following is not representation of following ecosystem?

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